Cvd-Grown Polypyrrole Nanofilms On Highly Mesoporous Structure Mno2 For High Performance Asymmetric Supercapacitors

Keywords

Asymmetric supercapacitor; Chemical vapor deposition; High energy density; High-porosity MnO 2; PPy nanofilms

Abstract

High-porosity MnO2 with a mesoporous structure is synthesized through a facile redox reaction, and the polypyrrole (PPy) nanofilms are grown on the synthesized mesoporous MnO2 by chemical vapor deposition to form a 3D nanocomposite structure. The as-prepared high-porosity MnO2/PPy with a nanocomposite structure presents a high specific capacitance of 320 F g−1 and a 91.4% capacitance retention after 5000 charge–discharge cycles. MnO2/PPy and N-doped active carbon are employed as a positive electrode and a negative electrode, respectively, to assemble an asymmetric supercapacitor (ASC), which exhibits a high energy density of 38.6 Wh kg−1 at 0.5 A g−1 and long-term cyclic stability (90.6% capacity retention after 5000 cycles). Such high-performance capacitive behavior is attributed to the high porosity, mesoporous structure, and improved electrical conductivity of the fabricated ASC, which is promising for various supercapacitor applications.

Publication Date

1-1-2017

Publication Title

Chemical Engineering Journal

Volume

307

Number of Pages

105-112

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.cej.2016.08.074

Socpus ID

84989870181 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84989870181

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